Origen

A variation of sweat (Old English) that started life as army slang. Swot was first ‘studying, school, or college work’, and referred especially to mathematics. This led to its use to describe someone who studies hard or excessively.

sweat the small stuff

I learned to make everything fun, not to sweat the small stuff, analyse worries, consider the options, choose one, stop worrying and get on with my life.

He said it all the time, as if to remind his kids that life is too short to sweat the small stuff.

She no longer sweats the small stuff, and instead of trying to manage the way her male counterparts do, she allows feminine compassion to flow into the workplace - which, she says, has made her a better leader.